Shutter drive



G. F. RACKETT SHUTTER DRIVE Filed July 26, 1934 2 Sheets-Sheet l April 6, 1937.

April 6, 1937. G. F. RACKETT SHUTTER DRIVE Filed July 26, 1934 2 Sheets-Sheet 2 auf Patented Apr. 6, A1093? PATENT OFFICE SHUTTER DRIVE Gerald F. Beckett, Los Angeles, Calif., assignor to Technicolor Motion Picture Corporation, Hollywood, Calif., a corporation of Maine Application July 26, 1934, Serial No. 737,032

Claims.

The present invention relates to a drive arrangementv which, although applicable to, other uses, is especially suited for motion picture cameras and similar photographic devices.

5 In certain photographic apparatus, as for example in' the camera described in copending application Serial No. 558,193, filed August 20, 1931, the objective is supported in a closure hinged to the camera housing. Associated with the,ob-`

1o jective are control devices as for example a rotating shutter, which are driven 'in synchronism with 'other movements of the camera, from a power source on the camera housing.

The main objects of the present invention are to provide an improved arrangement of the control device, for example a shutter, and to pro,

vide a simple and yet reliable connection between power supply and control device.

In one aspect, the invention contemplates the 'zmounting of the control device on the hinged axially with the hinge so that driving and driven l elements may remain connected regardless of the relative position "of housing and lens support.

These and other objects, features and embodiments of the invention will be apparent from'the following explanation of its genus with reference to a concrete embodiment thereof.

'Ihe description refers to drawings in which,

Fig. 1 is a front elevation cfa motion picture camera, with part of the housing and lens support structure brokeni away to show the drive according to the present invention;

Fig. 2 is a horizontal section on line 2-2 of Fig. 1; and

' Fig. 3 is a horizontal section on line 3 3 of Fig. 1.

Referring to the drawings, I denotes the walls of a camera housing. A door 5 preferably like the housing, a light metal casting, has a. clutch Journal boss 8 and a journal plate 1 supporting two tapered roller bearings II and I2 for shutter shaft I5 to which a helical gear wheel IB and the shutter proper Il are fastened. The camera housing has a recess or pocket I0 which receives 55 the shutter support portion of the door in open position A central opening I8 permits entrance of the light through lens system I9, which is not part of the present invention and therefore not further described. The shutter shaft housing extends upwardly and downwardly, Yforming hinge portions 2| with pressed in or otherwise fastened tubes 22, 23, which extend into essentially tubular hinge receptacles 25 of the housing which form' journals for tubes 22, 23, permitting rotation of the door about hinge axis h-h. Thrust bearing rings 28, 29 support-the door in vertical direction.

Fastened to tube 23 are two sleeves 3| and 32 which form beveled seats for ball bearings 34 and 35 supporting shaft 4I on collars 45 and 41. This shaft is mounted coaxially with the hinge, that is, its axis of rotation coincides with hinge axis h-h.y To the upper end of shaft III is screwed a helical gear wheel 42 drivingly engaging the above-described gear wheel I6 of the lshutter shaft;

Secured to the lower end of shaft 4I is a gear wheel 54 engaging worm 55 on driving shaft 56 which is suitably supported on the housing, for example by/means of bearing 5,1. This part of the drive is easily accessible through a cover 58.

It will now be evident that the shutter drive and the lens are always in the same relative position, and that the driving connection from worm 55 through shaft 4I to shutter I1 remains established regardless of the relative position of apparatus housing I and door 5.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall Within the scope of the appended claims.

I claim:

1. Optical apparatus of the character described comprising an apparatus housing, a door connected to said housing by a hinge having a hollow pintle portion extending along one side of said door, a lens system and alight control movement mounted on said door, a drive for said Vmovement mounted on said housing, and a power transmitting connection between said movement and said drive including a shaft within said hollow portion,

2. Optical apparatus -of the characterdescribed comprising an apparatus housing, a support member movably fastened to said housing for rotation about an axis, an optical system and a light control means mounted on said member, and a driving link between said housing and said control means for transmitting to said control means rotatory motion substantially in the direction oi' said axis. Y

3. Optical apparatus of the character described comprising an apparatus housing, a support member connected to said housing by a hinge structure, an optical system and a control device for said system mounted on said member, a power supply on said housing, and a link transmitting power substantially in the direction of the axis of said hinge structure and drivingly connecting said supply and said control device.

4. Optical apparatus of the character described comprising an apparatus housing, a door connected to said housing with a hinge structure having a hollow pintle portion, a lens system and a shutter therefor mounted on said door, a power supply shaft journaled on said housing, a shaft within said hollow portion, and gears on either end of said shaft for transmitting power t GERALD F. RACKETT. 

